Correct me if I'm wrong but I think the issue was that over time, the valve could leak and at least on my 21', there is no way to get to it without cutting the wall open. It's hidden in the wall.

Tom you got me there, but then again it is possible given time anything with a moving part could fail. I think Iíll just enjoy my camping trips and not worry about every worst case scenario that could happen, lifeís to short.

Correct me if I'm wrong but I think the issue was that over time, the valve could leak and at least on my 21', there is no way to get to it without cutting the wall open. It's hidden in the wall.

That is certainly my issue with an air valve hidden in a wall. Until convinced otherwise, I expect that eventually an air valve put in there will leak, and if the valve is inaccessible, it will be difficult to repair. If the air source for the valve is exterior to the trailer, slight long term leakage in the wrong direction will not cause odor in the trailer.

I could be wrong, but I think that the odor issue is a bit more of a challenge than in a house given the far smaller volume of interior air in a trailer.

Tom you got me there, but then again it is possible given time anything with a moving part could fail. I think Iíll just enjoy my camping trips and not worry about every worst case scenario that could happen, lifeís to short.

Cheers
Doug

Sorry Doug, I guess it's the engineer in me - I always look for points of failure and try to design them out. If it's going to fail regardless of the design, then I make sure it is accessible.

Sorry Doug, I guess it's the engineer in me - I always look for points of failure and try to design them out. If it's going to fail regardless of the design, then I make sure it is accessible.

No engineer here, but same attitude. There is usually enough unanticipated mischief to deal with without deliberately building in future problems, especially ones that would require major surgery to correct.

Airstreams have been using these air valve types in their units for years and my Lance Trailers had them. It is common in the rv industry, not in the residential home business.

They're even common in certain residential situations, typically when a sink is installed in a kitchen island, leaving no way to get a vent pipe to the ceiling. Of course, they use an air admittance valve - they don't just leave the end of the vent pipe open.